Hello,

You can opt for ECE in B.Tech if you are interested. But you need to learn certain basic topics of physics which were taught in your schools.

These are the basic topics you need to be good at if you are taking ECE:

1. Electromagnetism

2. Electrostatics

3. Electrodynamics

4. Optics

5. Communication signals

6. Semiconductor

Knowing these basics will be easier for you to understand the topics once you choose this course.

Hope it helps.